Chief Technical Officer in charge of the design team of the Super Aguri team, he also worked at Holden, Arrows and McLaren. Super Aguri F1 went out of business in 2008, but Mark still works as a designer, as he runs his own design company, Preston Racing. However, in 2014, he returned in a design and team principal role with Super Aguri again, this time in Formula E. He remains in the discipline but now as team principal of TeCheetah. As well as public speaking, he was also managing director at Formtech Composites Ltd, a racing composites firm. Preston also has a role in Zambian school charities and is involved in developing autonomous cars.